The Megaswitch P was specially developed for this purpose. Whereby all positions are meant to be buzz-free, the magnetic polarity of the coils must be NS-NS or SN-SN. This is the case on PRS guitars; here the neck and bridge pickups are poled differently from a magnetic perspective. In the event that in standard types the screw side should be the outer one and that buzz-free sound is required in all positions, the magnet in one of the two pickups must be turned.